docs: def __json_date_parse(json_object):
          """
          Parse dates in certain known json fields, if possible.
          """
          known_date_fields = ["created_at", "week", "day", "expires_at", "scheduled_at"]
          for k, v in json_object.items():
              if k in known_date_fields:
                  if v != None:
                      try:
                          if isinstance(v, int):
                              json_object[k] = datetime.datetime.fromtimestamp(v, pytz.utc)
                          else:
                              json_object[k] = dateutil.parser.parse(v)
                      except:
                          raise MastodonAPIError('Encountered invalid date.')
          return json_object